Adjustable scarfing tool

ABSTRACT

An adjustable scarfing apparatus comprising an elongated body member supporting a cutting tool within a welded tube. In accordance with one embodiment, a plurality of slides are dispersed radially about the body and at least one of the slides is made continuously adjustable inwardly or outwardly from the body. In accordance with another embodiment, a cutting tool having a circular cutting edge which may be indexed is employed with the plane of the cutting edge. The plane of the cutting edge is inclined at an angle of from about 30* to about 60* to the longitudinal axis of the tube. Alternatively, the apparatus may include both of these embodiments.

United States Patent 91 Boston v Feb. 5, 1974 [73] Assignee: OlinCorporation, New Haven,

Conn.

Denis R. Boston, Livingston, Ill.

22 Filed: A r. 21, 1972 21 Appl. No.: 246,307

52 us. or. 90/24 B, 29/33 D 51 1m. 01 B23d 1/24 [58] Field of Search90/24 B, 24 R; 29/33 D;

[56] References Cited UNITED STATES PATENTS 3,349,212 10/1967 Morris eta1. 219/59 3,177,776 4/1965 Marhanka 90/24 B 1,912,419 6/1933 Whitman90/24 B 1 1,954,511 4/1934 Adams, Jr. 90/24 B 3,165,028 1/1965 Keska90/24 B FOREIGN PATENTS OR APPLICATIONS France 90/24 B PrimaryExaminer-Andrew R. Juhasz Assistant Examiner-Z. R. Bilinsky Attorney,Agent, or Firm Robert l-l. Bachman 57] ABSTRACT An adjustable scarfingapparatus comprising an elongated body member supporting a cutting toolwithin a welded tube. In accordance with one embodiment, a plurality ofslides are dispersed radially about the body and at least one of theslides is made continuously adjustable inwardly or outwardly from thebody. In accordance with another embodiment, a cutting tool having acircular cutting edge which may be indexed is employed with the plane ofthe cutting edge. The plane of the cutting edge is inclined at an angleof from about 30 to about60 to the longitudinal axis of the tube.Alternatively, the apparatus may include both of these embodiments.

7 Claims, 9 Drawing Figures PATENIEBFEB smn 3789734 sum 1 m 2 o PATENTEBEB 5 I974 SHEEIZUFZ 1 ADJUSTABLE SCARFING TOOL BACKGROUND OF THEINVENTION This invention deals with an improved scarfing apparatus and awelding apparatus employing same, for welding metal strip into tube-Thisinvention is particularly directed to an improved scarfing apparatus foruse in aprocess of high frequency forge welding. Typical examples ofprior art high frequency forge welding apparatuses and processes are setforth in U.S. Pat. Nos. 3,037,105, granted May 29, 1962; 2,794,108,granted May 28, 1957; and 2,818,488, granted Dec. 31, 1957.

After the strip has been formed into a tubular shape the strip edges areheated to the welding temperature and then passed to a welding stationwherein the edges are pressed against each other with sufficient forceto forge weld them together thereby providing a fluid and pressure tighttube. The welded tube contains a longitudinally extending weld seams anda weld bead on its inside and outside surface at the weld seam. Thisinvention is concerned with the removal of the weld bead from the insidesurface of the tube.

Apparatuses are known in the art for removal of the weld bead on theinside surface of the tube. One specific example is set forth in U.S.Pat. No. 3,349,212, granted Oct. 24, 1967. This patent discloses ascarfing apparatus for removing the weld bead which comprises a mandrelsupporting a scarfing tool which may be indexed and an impeder. Themandrel has secured radially on its outer surface a plurality of slidesor wear strips for supporting and aligning the mandrel and scarfing toolrelative to the tube and weld bead.

These radially disposed slidescontribute a pressure reaction to thecutting tool and maintain it in cutting position within a fewthousandths of an inch for a uniform and controlled depth of cut. Thescarfing apparatus of the patent can be used in tubes of various sizesby utilizing slides of appropriate heights in accordance with the tubediameter or by adjusting the extent to which the slides are seated intheir respective recesses.

This latter adjustment is usually performed by inserting or removingshims from behind the slides and is required to compensate fordifferences in tube wall thicknesses for given outside diameters. It hasbeen found that the use of shims to provide this essential adjustmentinvolves a trial and error process which by its nature is extremely timeconsuming.

SUMMARY OF THE INVENTION In accordance with this invention an improvedscarfing apparatus has been developed in that provision has been made inthe apparatus for providing continuous adjustment of the height of atleast one of the radially disposed slides for compensating fordifferences in tube wall thickness. This adjustment may be provided bymeans of a screw which acts upon a cam which in turn acts upon theadjustable radial slide or slides to provide inward and outward movementof the slide or slides with respect to the body of the scarfingapparatus.

In accordance with another embodiment of this invention, the scarfingapparatus may contain a cutting tool having a circular cutting edgewhich may be indexed. The plane of the cutting edge is inclined towardthe longitudinal axis of the tube at an angle of 30 to 60 and preferablyat an angle of 45.

This incline of the cutting tool provides an excellent path for the LDscarf or weld bead which is being removed to travel through the body ofthe scarfing apparatus to the bottom of the tube to be carried alongwith the tube. This incline of the cutting edge of the tool alsoprovides through a geometric advantage an effective increase in thewidth of the cutting surface for a given diameter cutting tool over arange of tube diameters.

By providing a cutting tool in accordance with this invention inclinedabout 45 to the longitudinal axis of the tube, it is possible to scarftubing of varying diameters within a given range while leaving aresidual flash of less than 0.002. Preferably, the apparatus inaccordance with this invention contains both an inclined cutting tooland at least one adjustable slide as aforenoted.

It is accordingly an object of this invention to provide an adjustablescarfing apparatus for removing the weld bead on the inside surface of awelded tube.

It is a further object of this invention to provide an apparatus asabove with a plurality of slides radially dispersed about the peripheryof the apparatus wherein at least one of the radial slides iscontinuously adjustable inwardly and outwardly with respect to the bodyof the apparatus. I

It is a further object of this invention to provide an apparatus asabove wherein the scarfing apparatus includes a cutting tool having acircular cutting edge with the plane of the cutting edge inclined at anangle of about 30 to to the longitudinal axis of the tube.

It is a further object of this invention to provide an apparatus asabove having at least one adjustable radial slide and a cutting toolwith a circular cutting edge inclined as above.

It is a further object of this invention to provide a welding apparatusfor high frequency welding metal strip into tubing employing thescarfing apparatus as above.

Other objects and advantages will become apparent to those skilled inthe art as a detailed description of the preferred embodiments proceedswith reference to th drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a perspective view of atypical high frequency welding apparatus.

FIG. 2 shows a partial cross sectional view of the adjustable scarfingapparatus of this invention in its operable position within theas-welded tube.

FIG. 3 shows a top view of the scarfing apparatus of this invention. I

FIG. 4 shows a perspective view of the cutting tool which may be used inthe scarfing apparatus of this invention.

FIGS. 5A and 5B illustrate the effective increase in cutting surfaceobtained with the scarfing apparatus of the instant invention byinclining the cutting tool with respect to the longitudinal axis of thetube.

FIGS. 6A-6C show a plurality of views of as-welded tubes with thescarfing apparatus in place, wherein the as-welded tubes varysubstantially in diameter.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to thedrawings and especially to FIG. 1, there is illustrated a typicalwelding apparatus 1 for welding metal strip in the form of a preformedopen tube 2 into tubing. The apparatus is adapted to weld together theopposed edges 3 and 4 which form the longitudinal gap 5 in the openmetal tubing 2.

The open tube 2 is formed in a forming mill (not shown) situated in lineimmediately preceding the apparatus 1. The forming mill is ofconventional well known design. The forming mill may contain a pluralityof roll stands or dies which form metal strip into the open tube 2. Itis to be understood that other roll stands may be situated in lineimmediately following the apparatus 1 to further shape or size thetubing such as, for example, to correct out of roundness. The rollstands are generally power driven and, therefore, provide means forrapidly and longitudinally advancing the tubing. Alternatively, thismeans may be power driven weld rolls 6 as shown.

The weld rolls 6 comprise a pair of pressure rollers of known form whichengage opposite sides of the tube 2 and cause the longitudinallyextending gap 5 therein to become closed substantially at a weld point 7forming a V shaped gap 8. As the open tubing 2 advances to the weldpoint 7, the edges 3 and 4 at the gap 8 become welded together along theweld seam 9.

The edges 3 and 4 and the V shaped gap 8 are heated by means of aninduction coil 10 or contacts. The induction coil 10 shown is a singleturn coil; however, a multiturn coil or other appropriate device couldbe substituted for the single turn coil.

The coil 10 is formed of wrought metal tubing. The

coil is electrically connected to a source of high frequency current,not shown. The high frequency current is normally at least 100kilocycles per second and, preferably, at least 400 kilocycles persecond or higher. The coil is also connected to a source of coolingmedium (not shown) which flows through the tubing to keep it fromoverheating.

The apparatus 1 also includes the following elements as shownschematically in FIG. 1. A scarfing apparatus 11 comprises a man-drel 12which supports a cutting tool 13 for removing the weld bead 14 on theinside 7 surface of the tube 2'. A plurality of slides 15 are providedabout the periphery of the mandrel 12 for supporting and aligning itand'the cutting tool 13 relative to the tube 2' and weld bead 14.

The mandrel 12 may bejof any known construction and the shape shown inFIG. 1 is merely schematic. A typical example of a prior art mandrel 12is shown in U.S. Pat. No. 3,349,212. The mandrel 12 may also support animpeder 16 for improving the efficiency of the induction coil l0 byincreasing the impedence of the high frequency current paths around theback of the open tube 2.

This reduces the flow of current around the back of the tube 2 andincreases the flow of current along the tube edges 3 and 4 running froma point on the tube edge 3 adjacent the coil 10 to the weld point 7 andback the opposing edge 4 to a point adjacent the coil 10. This resultsin more efficient heating of the edges 3 and 4 of the open tube 2, theedges being heated up to the welding temperature upon reaching the weldpoint 7. The impeder may be of any suitable known construction as, forexample, that set forth in U.S. Pat. No. 3,349,212.

A source, of cooling medium (not shown) such as water is connected to ahollow supporting arm 17 for flowing water about a core of magneticmaterial which comprises the impeder 16. The core of magnetic materialshould be of an insulating nature to provide a core substantially freeof eddy current losses. The core is preferably a sintered magnetic oxideinsulating material, preferably of types now well known which have a lowloss factor and high volume resistivity. A suitable material is marketedunder the name Ferramic by General Ceramic and Steatite Corporation, thepermeability thereof being substantially greater than unity.

The cooling medium passes through the hollow supporting arm 17 and flowsabout the impeder l6 and is then discharged within the welded tube 2'through holes 18.

Further, since the angle of the V shaped gap 8 is important, a seamguide means 19 is generally included at a point in advance of theinduction coil 10 to accurately space apart the edges of the tube 2 and,thereby, obtain the desired angle. The seam guide means may be formed ofa suitable insulating material protruding down into the gap so that theroll stand preceding that position (not shown) will cause the tube gapedges 3 and 4 to be pressed against the opposite sides of the seam guide19 whereby the edges are maintained with a uniform separation.

The welding apparatus just described is but one type of apparatus usefulwith the instant invention and numerous other high frequency'weldingapparatus are known which could be employed in place thereof.

The combination of an impeder-scarfing apparatus may comprise a singlebody or mandrel incorporating both a scarfing tool and an impeder as inFIG. 1 or connected bodies one of which contains the scarfing tool andthe other the'impeder. This'latter approach is particularly useful whenemploying impeders having a design analogous to that shown in U.S. Pat.No. 3,054,883, granted Sept. 18, 1962. However, this invention isequally applicable to both types of apparatuses and is also applicableto welding apparatuses employing a scarfing apparatus without animpeder.

This invention is directed to the slides which are supported about theperiphery of the scarfing apparatus and to the orientation of the planeof the cutting edge of the cutting tool.

Referring to FIGS. 2 and 3 in accordance with one embodiment of theinvention the scarfing apparatus 20 comprises a body 21 which consistsof an elongated member. The body 21 has a bore 22 or hole extendingsubstantially centrally and longitudinally within it. The crosssectional shape of the bore 22 may be chosen as desired. A cylindricalbore22 is shown. The scarfing apparatus 20 of FIGS. 2 and-3 containsthree radial slides 23 and 24; however, any desired number could beemployed and it is noted, for example, that in U.S. Pat. No.3,349,2l2,'four slides are employed.

Two of the slides 23 are clamped by a plate 25 which fits in a recess ofthe body 21 such that the outside contour of the plate substantiallycorresponds to the outside contour of the body. The plate 25 andtherefore, the slides 23 are mounted to the body 21 by means of screws26.

The slides 23 and 24 as shown comprise elongated members having curvedend portions 27. They may be fonned of any desired material depending onthe surface quality required in the finished product. Various high wearresistant nylons are particularly adapted to be used as slides and ifsurface quality tolerances are liberal metal slides formed of materialssuch as leaded brass could be employed. The particular material employedfor the slides are well known in the art and are not considered to be apart of the instant invention.

In accordance with this invention, at least one of the slides 24 asshown in FIG. 2 is moveable inwardly or outwardly with respect to thebody 21 of the scarfing apparatus 20. The moveable slide 24 as shown inFIG.

2 moves within a hole 28 in the body 21 which conforms in cross sectionas close as possible to the shape of the outside periphery of the slide.The hole 28 in the body communicates with the bore 22.

The outside face 29 of the slide 24 engages the welded tube 2. Theopposing face 30 of the slide 24 is inclined with respect to the face 29and the longitudinal axis of the tube 2 a desired amount to provide aninclined plane. The degree of incline may be set as desired depending onthe size of the scarfing apparatus 20 particularly the diameter of thebody 21. For a /8 inch body diameter,it has been found preferably toemploy an incline on the inside face 30 of the slide 24 of from about 3to about 8 with respect to the longitudinal axis of the tube 2'.

A cam 31 is provided within the bore 22 of the body 21 having oneoperable face 32 adapted to contact the inclined face 30 of theadjustable slide 24 and, therefore, having an angle of inclination withrespect to the longitudinal axis of the tube 2 substantially the same asthe inclined face 30 of the slide 24. The cam 31 comprises an elongatedmember adapted to move within the bore 21 of the body. The face 33 ofthe cam 31 opposing the face 32 which contacts the adjustable slide 24contacts the inside surface of the bore 21 and preferably conforms tothe cross sectional shape of the inside surface of the bore.

One of the end faces 34 of the cam 31 which lies intermediate the camface 33 which contacts the surface of the bore 21 and the cam face 32which contacts the inclined face 30 of the slide 24 is inclined withrespect to the longitudinal axis of the tube a desired amount dependingon the diameter of the body 21. This inclined end face 34 forms aninclined plane which is adapted to coact with the leading end 35'of anadjustment screw v36 to provide the continuous adjustment. The leadingend 35 of the adjustment screw 36 has a conical face 37 wherein thesurface of the cone is inclined to the longitudinal axis of the tube 2an amount substantially equal to the angle of inclination of theinclined end face 34 of the cam 31.

For a inch diameter body 21'it has been found that the angle ofinclination with respect to the longitudinal axis of the tube of theinclined end face 34 of the cam 31 and of the conical face 37 of theadjustment screw 36 should be from about to about 45. The aforenotedangles of inclination for the cam faces 32 and 34 and the conical andincluded faces 37 and 30 of the adjustment screw 36 and adjustable slide24,respectively, provide a total range of adjustment for the slide 24inwardly or outwardly of from about 0.020 inch to about 0.1 inch. Othercombinations of angles of inclination and body diameters would permitconsiderable modification in the range of adjustment of the adjustableslide 24.

In operation, as the adjustment screw 36 is screwed into the body 21 ofthe scarfing apparatus the conical face 37 of the screw 36 acts upon theinclined end face 34 of the cam 31 to move the cam in a direction towardthe closed end of the bore 22. This movement of the cam 31 causesthrough coaction of the inclined face 32 of the cam and the inclinedface 30 of the adjustable slide 24 outward movement of the slide 24 fromthe body 21. Similarly, a withdrawal of the screw 36 causes the slide 24to move inward due to pressure exerted upon it by the tube 2 surfacewhich in turn causes a corresponding movement of the cam 31 which islimited by the depth to which adjustment screw 36 protrudes in the bore22.

Only one slide 24 has been shown to be adjustable in the scarfingapparatus 20 of figs. 2 and 3 since only three slides are employed inthat apparatus; however, in other apparatuses such as the scarfingapparatus of U.S. Pat. No. 3,349,212, more than one slide 24 could bemade adjustable by merely providing a cam 31 having more than oneinclined face 32 which act upon the corresponding inclined faces 30 ofthe adjustable slides.

The purpose of the adjustable slide 24 in accordance with this inventionis to enable the scarfing apparatus 20 to be preloaded to eliminate toolchatter during operation of the welding apparatus. If the adjustableslide is improperly adjusted and the scarfing apparatus 20 rides tooloosely within the tube 2, tool chatter results which adverselyeffectsthe quality of the scarfed surface.

Referring to FIG. 6, it is readily apparent that the height H of theradial slides 23 and 24 will vary depending on the tube 2 diameter.Therefore, it is necessary to change to slides 23 and 24 of differentheights for given tube diameters. The adjustment provided in accordancewith this invention is not sufficient to compensate for markeddifferences in tube diameter. However, it is sufficient to compensatefor the differences in inside diameter of the tube as compared to theoutside diameter due to differences in tube wall thicknesses.

In accordance with another embodiment of the scarfing apparatus 20 ofthis invention, the cutting tool 40 has a circular cutting edge 41' asshown in FIG. 3 so that it may be indexed from time to time to provide afresh sharp cutting edge segment as the used segment is dulled. The useof a cutting tool that may be indexed is not new, see for example U.S.Pat. No. 3,349,212.

The cutting tool 40 of FIG. 4 has a frustrated conical shape and isuniquely adapted for use in the scarting apparatus 20 of FIGS. 2 and 3in that the plane 42 cutting edge 41 may be inclined with respect to thelongitudinal axis of the tube 2 at an angle of from about 30 to aboutwith the preferred angle of inclination being approximately 45.

As shown in FIG. 2, inclining the cutting tool 40 as aforenoted resultsin the provision of an excellent path for the scarf or weld bead 14which is being removed to travel through the body 21. Further, and moresignificantly, as shown in FIG. 5 inclining the circular cutting tool 40increases the effective width of the operable segment 43 cutting edge 41with respect to the inside surface of the tube 2. FIG. 5A shows that ifthe plane 42 of the cutting edge 41 is normal to the longitudinal axisof the tube 2', there would be a fairly narrow operable segment 43 ofthe cutting edge.

As shown in FIG. 5B when the plane 42 of the cutting edge 41 of the tool40 is inclined to the longitudinal axis of the tube 2' at an angle ofapproximately 45 there results a geometric advantage which provides anincrease in the operable segment 43 of the cutting edge 41 and aconsequent increase in the width of the scarf removal area. Thisgeometric advantage allows a relatively small diameter cutting tool 40to be used inside a larger diameter tube 2 and also allows the tool 40to be employed for scarfing tubes having a range of diameters.

Therefore, it has been found in accordance with this invention that ainch diameter cutting tool 40 can effectively scarf tube diameters offive-eighths to seveneights inch; that a /2 inch diameter tool 40 iseffective for tubes having a diameter of /8 to 1% inch; and that a 3 1inch diameter tool 40 is effective for tube diameters of 1 /8 inch to 3/8 inch.

FIG. 6 illustrates the effectiveness of the tool inclined at the 45angle in accordance with this invention for scarfing tubes having anoutside diameter of inch, 1 inch and 1 /8 inch. The cutting tool 40 maybe attached to the body 21 by any conventional means. The cutting tool40 in accordance with FIGS. 2 and 3 is intermittently adjustable;however, a continuously adjustable cutting tool analogous to that of US.Pat. No. 3,349,212 could be employed. The tool 40 in FIGS. 2 and 3 isheld in place in the body 21 by means of a clamp 44 comprising a plate45 and screw 46 which secures the plate and thereby clamps the tool tothe body.

The tool 40 rests against an inclined recessed surface 47 in the body 21which effectively sets the angle of inclination ofthe tool and alsoagainst a recessed shoulder 48. The height of the cutting edge 41 abovethe surface of the body '21 which determines the depth of the cut duringscarfing may be changed by inserting shims between the inclined surface47 and the leading face 40 of the tool 40 thereby moving the tool alongthe shoulder 48 which by virtue of its incline increases or decreasesthe amount of metal removal depending on the position of the tool.

A conduit 50 is provided just in front of the cutting tool 40 and incommunication therewith and it extends completely through the body 21 ofthe apparatus 20. The conduit 50 is inclinedat an angle substantiallythe same as that of the cutting tool 40. The scarf or weld bead 14 whichis removed passes through the conduit 50 to the opposing surface of thetube 2' where it is withdrawn within the travelling tube. v

In the apparatus of FIGS. 2 and 3, a moveable joint 60 is provided whichgenerally allows the body 21 of the apparatus to pivot in the verticaldirection thereby providing for any curvature or flexing in the asweldedtube without impairing the alignment of the cutting tool 40. Themoveable joint 60 comprises a slot 61 in the upstream end of thescarfing apparatus 20 which is adapted to receive the tongue 62 of theconnecting member 63. A pin 64 passing through the body 21 at the slot61, and the tongue 62 of the connecting member 63, provides for thepivoting motion. The other end of the connecting member 63 is adapted tobe secured to a conventional means (not shown) for holding the scarfingapparatus in place during welding.

In practice, the height of the continuously adjustable slide 24 can beadjusted in line in the welding apparatus by either cutting a hole inthe welded tube 2' at a point 6 welding the strip edges together so thatthey may be 5 pried apart to perform this adjustment. The slide 24 isadjusted until resistance is met in the tightening of the adjustmentscrew 36 thereby providing a snug but moveable association between thescarfing apparatus 20 and the welded tube 2'. Alternatively, theseadjustments may be performed off line utilizing a section of as-weldedtube 2' and cutting a hole above the adjustment screw 36 as aforenotedor merely leaving the adjustment screw extending out from the end of thetube.

The height of the cutting edge is normally adjusted off line utilizing asection of as-welded tube 2 and shims as aforenoted.

The body 21 of the scarfing apparatus 20 may be formed of any desiredmaterial; however, preferably, it should be a non-magnetic material suchas austinitic stainless steel or aluminum-bronze.

Referring again to FIG. 4, the cutting tool 40 is shown. In accordancewith an alternative embodiment as compared to the tool 40 of FIGS. 2 and3, a frustrated conical discharge surface S may be employed intermediatethe cutting tool face 49 and the cutting edge 41. This conical dischargesurface S should be inclined with respect to the plane 42 of the cuttingedge 41 from about 10 to about 20 and, preferably, approximately about15. The cone base of the discharge surface S comprises the plane 42 ofthe cutting edge 41.

The purpose of the conical discharge surface S is to change thedischarge angle so as to provide a better angle of travel for the scarf14 which is being removed and further to give the cutting edge 41 morecross section which is beneficial for machinability of different vmaterials.

For example, with the plane 42 of the cutting edge 41 inclined at anangle of about 45 to the longitudinal axis of the tube, the use of atool having a conical discharge surface inclined with respect to theplane of the cutting edge at an angle of about 15 increases thedischarge angle with respect to the longitudinal axis of the tube from45 to about 60.

Therefore, in summary, in accordance with one embodiment of the instantinvention at least one continuously adjustable slide is provided in thescarfing apparatus for maintaining the alignment of the apparatus withinthe welded tube, and in accordance with another embodiment of theinvention, a cutting tool having a circular cutting edge which can beindexed and which is inclined to the longitudinal axis of the tube isprovided in the scarfing apparatus. Alternatively, both of theseembodiments may be provided in the same scarfing apparatus.

The term body diameter as employed in the aforenoted description refersto the diameter of the body at the upstream end of the scarfingapparatus as employed during welding. Referring to FIGS. 2 and 3, theupstream end is the end with the moveable joint 60.

This invention may be embodied in other forms or carried out in otherways without departing from the spirit or essential characteristicsthereof. The present embodiment is therefore to be considered as in allrespects illustrative and not restrictive, the scope of the inventionbeing indicated by the appended claims, and all changes which comewithin the meaning and range of equivalency are intended to be embracedtherein.

What is claimed is:

1. A scarfing apparatus for removing the weld bead on the inside surfaceof a welded tube comprising:

an elongated body member;

means supported by said body for removing said weld bead;

a plurality of slides radially dispersed about the periphery of saidbody, said slides being operable to align said body and said removalmeans within said tube;

at least one of said slides being continuously adjustable outwardly orinwardly with respect to said body;

means supported by said body for providing said continuous adjustmentfor said at least one of said slides; and

wherein said body has a bore of a desired diameter extendingsubstantially centrally and longitudinally within it and wherein saidbody also has at least one hole adapted to receive said at least oneadjustable slide, said at least one hole communicating with said boreand wherein said means for providing said continuous adjustment includesmeans supported within said body and said bore for acting upon said atleast one adjustable slide to move it inwardly or outwardly.

2. A scarfing apparatus as in claim 1 wherein said means supportedwithin said bore and said body comprises an elongated longitudinallyextending cam which acts upon said at least one adjustable slide and anadjustment screw within said body which communicates with said bore andwhich acts upon said elongated cam.

3. A scarfing apparatus as in claim 2 wherein an inside face of said atleast one slide is inclined a desired amount to the longitudinal axis ofsaid tube and at least one longitudinally extending face of said camwhich is adapted to act upon said inclined face of said at least oneslide is inclined to the longitudinal axis of said tube at an anglesubstantially the same as said slide face, said faces contacting oneanother, and further wherein an end face of said cam is inclined to thelongitudinal axis of said tube a desired amount and the leading end ofsaid adjustment screw has a conical face which is inclined to thelongitudinal axis of said tube at an angle substantially the same assaid end face, said conical face contacting said end face, whereby whensaid adjustment screw is adjusted to protrude to a greater or lesserextent into said bore the coaction of said end faceof said cam and saidconical face of said screw causes said cam to move longitudinally withinsaid bore, which in turn through the coaction of said inside face ofsaid at least one slide and said longitudinal face of said cam causessaid slide to move outwardly or inwardly respectively, with respect tosaid body.

4. A scarfing apparatus as in claim 3 wherein said means for removingsaid weld bead comprises a cutting tool having a circular cutting edgewhich may be indexed wherein the plane of the cutting edge is inclined10 toward the longitudinal axis of the tube at an angle of from about 30to about 5. A scarfing apparatus as in claim 4 wherein said cutting toolfurther includes a leading face and a frustrated conical dischargesurface intermediate said cutting edge and said leading face and whereinsaid plane of said cutting edge comprises the base of said conicaldischarge surface and wherein said conical discharge surface is inclinedto said plane of said cutting edge at an angle of from about 10 to about20.

6. A scarfing apparatus for removing the weld bead on the inside surfaceof a welded tube comprising:

an elongated body member;

means supported by said body for removing said weld bead comprising acutting tool having a circular cutting edge which may be indexed,wherein the plane of the cutting edge is inclined toward thelongitudinal axis of the tube at an angle of from about 30 to about 60and wherein said cutting tool further includes a leading face and afrustrated conical discharge surface intermediate said cutting edge andsaid leading face and wherein said plane of said cutting edge comprisesthe base of said conical discharge surface and wherein said conicaldischarge surface is inclined to said plane of said cutting edge at anangle of from about 10 to about 20;

a plurality of slides radially dispersed about the periphery of saidbody, said slides being operable to align said body and said removalmeans within said tube;

at least one of said slides being continuously adjustable outwardly orinwardly with respect to said body; and

means supported by said body for providing said continuous adjustmentfor said at least one of said slides.

7. A scarfing apparatus for removing the weld bead on the inside surfaceof a welded tube comprising an elonagted body member adapted to ridewithin said welded tube and a cutting tool supported by said body forremoving said weld bead, said cutting tool having a circular cuttingedge with the plane of said cutting edge being inclined to thelongitudinal axis of said tube at an angle of from about 30 to about 60wherein said cutting tool further includes a leading face and afrustrated conical discharge surface intermediate said cutting edge andsaid leading face and wherein said plane of said cutting edge comprisesthe base of said conical discharge surface and wherein said conicaldischarge surface is inclined to said plane of said cutting edge at anangle of from about 10 to about 20.

1. A scarfing apparatus for removing the weld bead on the inside surfaceof a welded tube comprising: an elongated body member; means supportedby said body for removing said weld bead; a plurality of slides radiallydispersed about the periphery of said body, said slides being operableto align said body and said removal means within said tube; at least oneof said slides being continuously adjustable outwardly or inwardly withrespect to said body; means supported by said body for providing saidcontinuous adjustment for said at least one of said slides; and whereinsaid body has a bore of a desired diameter extending substantiallycentrally and longitudinally within it and wherein said body also has atleast one hole adapted to receive said at least one adjustable slide,said at least one hole communicating with said bore and wherein saidmeans for providing said continuous adjustment includes means supportedwithin said body and said bore for acting upon said at least oneadjustable slide to move it inwardly or outwardly.
 2. A scarfingapparatus as in claim 1 wherein said means supported within said boreand said body comprises an elongated longitudinally extending cam whichacts upon said at least one adjustable slide and an adjustment screwwithin said body which communicates with said bore and which acts uponsaid elongated cam.
 3. A scarfing apparatus as in claim 2 wherein aninside face of said at least one slide is inclined a desired amount tothe longitudinal axis of said tube and at least one longitudinallyextending face of said cam which is adapted to act upon said inclinedface of said at least one slide is inclined to the longitudinal axis ofsaid tube at an angle substantially the same as said slide face, saidfaces contacting one another, and further wherein an end face of saidcam is inclined to the longitudinal axis of said tube a desired amountand the leading end of said adjustment screw has a conical face which isinclined to the longitudinal axis of said tube at an angle substantiallythe same as said end face, said conical face contacting said end face,whereby when said adjustment screw is adjusted to protrude to a greateror lesser extent into said bore the coaction of said end face of saidcam and said conical face of said screw causes said cam to movelongitudinally within said bore, which in turn through the coaction ofsaid inside face of said at least one slide and said longitudinal faceof said cam causes said slide to move outwardly or inwardlyrespectively, with respect to said body.
 4. A scarfing apparatus as inclaim 3 wherein said means for removing said weld bead comprises acutting tool having a circular cutting edge which may be indexed whereinthe plane of the cutting edge is inclined toward the longitudinal axisof the tube at an angle of from about 30* to about 60*.
 5. A scarfingapparatus as in claim 4 wherein said cutting tool further includes aleading face and a frustrated conical discharge surface intermediatesaid cutting edge and said leading face and wherein said plane of saidcutting edge comprises the base of said conical discharge surface andwherein said conical discharge surface is inclined to said plane of saidcutting edge at an angle of from about 10* to about 20*.
 6. A scarfingapparatus for removing the weld bead on the inside surface of a weldedtube comprising: an elongated body member; means supported by said bodyfor removing said weld bead comprising a cutting tool having a circularcutting edge which may be indexed, wherein the plane of the cutting edgeis inclined toward the longitudinal axis of the tube at an angle of fromabout 30* to about 60* and wherein said cutting tool further includes aleading face and a frustrated conical discharge surface intermediatesaid cutting edge and said leading face and wherein said plane of saidcutting edge comprises the base of said conical discharge surface andwherein said conical discharge surface is inclined to said plane of saidcutting edge at an angle of from about 10* to about 20*; a plurality ofslides radially dispersed about the periphery of said body, said slidesbeing operable to align said body and said removal means within saidtube; at least one of said slides being continuously adjustableoutwardly or inwardly with respect to said body; and means supported bysaid body for providing said continuous adjustment for said at least oneof said slides.
 7. A scarfing apparatus for removing the weld bead onthe inside surface of a welded tube comprising an elonagted body memberadapted to ride within said welded tube and a cutting tool supported bysaid body for removing said weld bead, said cutting tool having acircular cutting edge with the plane of said cutting edge being inclinedto the longitudinal axis of said tube at an angle of from about 30* toabout 60* wherein said cutting tool further includes a leading face anda frustrated conical discharge surface intermediate said cutting edgeand said leading face and wherein said plane of said cutting edgecomprises the base of said conical discharge surface and wherein saidconical discharge surface is inclined to said plane of said cutting edgeat an angle of from about 10* to about 20*.